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  • Poly[(μ4‐2,5‐Dimethoxybenzene (cas 151-10-0)‐1,4‐dicarboxylato)manganese(II)] and its zinc(II) analogue: three‐dimensional coordination polymers containing unusually coordinated metal centres
  • Add time:09/28/2019         Source:infona.pl

    The title compounds, [Mn(C10H8O6)]n and [Zn(C10H8O6)]n, are isomorphous coordination polymers prepared from 2,5‐dimethoxyterephthalic acid (H2dmt) and the respective metal(II) salts. Both complexes form three‐dimensional metal–organic frameworks with each MII centre bridged by four 2,5‐dimethoxyterephthalate (dmt2−) anions, resulting in the same type of network topology. The asymmetric unit consists of one MII cation on a twofold axis and one half of a dmt2− anion (located on a centre of inversion). In the crystal structure, the MII centres are coordinated in a rather unusual way, as there is a distorted tetrahedral inner coordination sphere formed by four carboxylate O atoms of four different dmt2− anions, and an additional outer coordination sphere formed by two methoxy and two carboxylate O atoms, with each of the O atoms belonging to one of the four different dmt2− anions forming the inner coordination sphere. Consideration of both coordination spheres results in a super‐dodecahedral coordination geometry for the MII centres. Besides the numerous MII...O interactions, both structures are further stabilized by weak C—H...O contacts.

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